Baidu shares sank 3.9% in Hong Kong trading on Tuesday. The stock closed at HK$141.60 amid a broader market sell-off.
The decline reflected a wider negative trend. The Hang Seng Tech Index dropped, and the main Hang Seng Index headed for its fourth consecutive day of losses.
The drop was not linked to a specific company announcement. Investors attributed the decline to jitters over a slowdown in China's economy. Geopolitical uncertainty, including tariff fears, also contributed to the pressure.
Baidu ranked among the biggest decliners. Macroeconomic pressures impacted major technology stocks during the session.